hxthanh

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seen Dec 16 '12 at 13:51

Dec
3
awarded  Editor
Dec
3
revised Proving a binomial sum identity
added 321 characters in body
Dec
1
comment Proving a binomial sum identity
Fix this problem as follows sum for $k=0$ to $n-1$ and $k=n$ is calculated separately
Dec
1
comment Proving a binomial sum identity
Wah! Thanks for pointing out errors in my solution.
Nov
29
awarded  Teacher
Nov
29
answered Proving a binomial sum identity